Merge PR #150: Enhance validator client type validation

Author: bussyjd

charts/dv-pod/templates/_helpers.tpl

@@ -156,7 +156,44 @@ Validate validator client type
 {{- $validTypes := list "lighthouse" "lodestar" "teku" "prysm" "nimbus" -}}
 {{- $currentType := .Values.validatorClient.type -}}
 {{- if not (has $currentType $validTypes) -}}
-{{- fail (printf "ERROR: Invalid validator client type '%s'. Valid options are: %s" $currentType (join ", " $validTypes)) -}}
+{{- $errorMsg := printf "\n\nERROR: Invalid validator client type '%s'.\n\nValid options: %s" $currentType (join ", " $validTypes) -}}
+{{- /* Try to find the closest match using simple heuristics */ -}}
+{{- $suggestion := "" -}}
+{{- $currentLower := lower $currentType -}}
+{{- /* Check for common typos and confusions */ -}}
+{{- $typoMap := dict "loki" "lodestar" "lodestar-" "lodestar" "lighthose" "lighthouse" "lighthouse-" "lighthouse" "tekku" "teku" "teku-" "teku" "prisim" "prysm" "prism" "prysm" "prysm-" "prysm" "nimbos" "nimbus" "nimbus-" "nimbus" -}}
+{{- if hasKey $typoMap $currentLower -}}
+{{- $suggestion = get $typoMap $currentLower -}}
+{{- else -}}
+{{- /* Check for prefix matches (at least 2 characters) */ -}}
+{{- range $validType := $validTypes -}}
+{{- $validLower := lower $validType -}}
+{{- if and (gt (len $currentLower) 1) (hasPrefix $validLower (substr 0 2 $currentLower)) -}}
+{{- $suggestion = $validType -}}
+{{- end -}}
+{{- if and (gt (len $currentLower) 2) (hasPrefix $validLower (substr 0 3 $currentLower)) -}}
+{{- $suggestion = $validType -}}
+{{- end -}}
+{{- /* Check if valid type contains the input or vice versa */ -}}
+{{- if and (gt (len $currentLower) 2) (contains $validLower $currentLower) -}}
+{{- $suggestion = $validType -}}
+{{- end -}}
+{{- if and (gt (len $currentLower) 2) (contains $currentLower $validLower) -}}
+{{- $suggestion = $validType -}}
+{{- end -}}
+{{- end -}}
+{{- end -}}
+{{- /* Add suggestion to error message if found */ -}}
+{{- if $suggestion -}}
+{{- $errorMsg = printf "%s\n\n⚠️  Did you mean '%s'?" $errorMsg $suggestion -}}
+{{- end -}}
+{{- /* Use suggestion if available, otherwise use lodestar as example */ -}}
+{{- $exampleType := "lodestar" -}}
+{{- if $suggestion -}}
+{{- $exampleType = $suggestion -}}
+{{- end -}}
+{{- $errorMsg = printf "%s\n\nHow to fix this:\n  • Using --set flag:\n    --set validatorClient.type=%s\n\n  • In your values.yaml file:\n    validatorClient:\n      type: %s\n\n  • Using custom values file:\n    helm install my-dv-pod obol/dv-pod -f myvalues.yaml\n\nFor more information, see the Validator Client section in charts/dv-pod/README.md\n" $errorMsg $exampleType $exampleType -}}
+{{- fail $errorMsg -}}
 {{- end -}}
 {{- end -}}
 {{- end -}}